package com.jee.support.nio;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class ChannelCopy {
	private static final int BSIZE = 1024;
	public static void main(String[] args) throws Exception{
		if(args.length != 2){
			System.out.println("arguments:sourcefile destfile");
			System.exit(1);
		}
		FileChannel in = new FileInputStream(args[0]).getChannel(),
		out = new FileOutputStream(args[1]).getChannel();
		ByteBuffer buffer = ByteBuffer.allocate(BSIZE);
		while(in.read(buffer) != -1){
			buffer.flip(); //Prepare for writing
			out.write(buffer);
			buffer.clear();//Prepare for reading
		}
	}
}
